v3.23.1
Stockholders' Equity (Deficit) - Summary of Warrant Activity (Details) - $ / shares
 9 Months Ended 12 Months Ended
Jan. 31, 2023
Apr. 30, 2022
Apr. 30, 2021
Class of Warrant or Right [Line Items]      
Warrants Outstanding and Exercisable, Beginning Balance 851,860 667,740 662,361
Warrants Outstanding and Exercisable, Issued 3,652,826 806,201 13,992
Warrants Outstanding and Exercisable, Exercised (139,356)    
Warrants Outstanding and Exercisable, Cancelled (1,365,960) (909)  
Warrants Outstanding And Exercisable, Expired   (621,172) (8,613)
Warrants Outstanding and Exercisable, Ending Balance 3,589,911 851,860 667,740
Exercise Price Per Share, Issued   $ 7.45 $ 8.25
Exercise Price Per Share, Exercised $ 0.0001    
Exercise Price Per Share, Cancelled 5.16 8.25  
Exercise Price Per Share, Expired     12.21
Weighted Average Strike Price Per Share, Beginning Balance 9 18.26 18.39
Weighted Average Strike Price Per Share, Issued 4.09 9 8.25
Weighted Average Strike Price Per Share, Exercised 0.0001    
Weighted Average Strike Price Per Share, Cancelled 5.16 8.25  
Weighted Average Strike Price Per Share, Expired   18.96 12.21
Weighted Average Strike Price Per Share, Ending Balance $ 4.32 $ 9 18.26
Previously Reported      
Class of Warrant or Right [Line Items]      
Warrants Outstanding and Exercisable, Beginning Balance 1,442,401    
Warrants Outstanding and Exercisable, Ending Balance   1,442,401  
Weighted Average Strike Price Per Share, Beginning Balance $ 9    
Weighted Average Strike Price Per Share, Ending Balance   $ 9  
Minimum      
Class of Warrant or Right [Line Items]      
Exercise Price Per Share, Beginning Balance 3.47 3.47 3.47
Exercise Price Per Share, Issued 0.0001    
Exercise Price Per Share, Expired   9.9  
Exercise Price Per Share, Ending Balance 0.0001 3.47 3.47
Minimum | Previously Reported      
Class of Warrant or Right [Line Items]      
Exercise Price Per Share, Beginning Balance 3.47    
Exercise Price Per Share, Ending Balance   3.47  
Maximum      
Class of Warrant or Right [Line Items]      
Exercise Price Per Share, Beginning Balance 15.18 49.5 49.5
Exercise Price Per Share, Issued 4.25    
Exercise Price Per Share, Expired   49.5  
Exercise Price Per Share, Ending Balance 15.18 15.18 $ 49.5
Maximum | Previously Reported      
Class of Warrant or Right [Line Items]      
Exercise Price Per Share, Beginning Balance $ 15.18    
Exercise Price Per Share, Ending Balance   $ 15.18